<p>To simplify the manufacture of a rotor and miniaturize a compressor while easily keeping a balance between the rotor and the eccentric part of a crankshaft. A rotor (52A) comprises a body (521) and a balance weight (71). The body (521) is provided with a through-hole (521a) that extends through the body along the direction (91). The body (521) includes steel plates (5211) laminated in the direction (91). The balance weight (71) is inserted into the through-hole (521a). The length (L71) of the balance weight (71) in the direction (91) is shorter than the length (L521a) of the through-hole (521a) into which the balance weight (71) is inserted.</p>
